Paper-trimming machine.



, Patanted Dec. 3|, I90I. C. SEYBOLD.

PAPER Tmmnma MACHINE.

(Application filed May 13, 1901.)

(In Modal.)

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ilnirrnn STATES CHARLES SEYBOLD,

ATENT OFFICE.

OF DAYTON, OHIO.

SPEGlElGATION forming part of Letters Patent No. 689,920, dated December 31, 1901.

Application filed May 13. 1901. Serial No. 59,983. (No model.)

To all whont it may concern:

. Be it known that I, CHARLES SEYBOLD, a citizen of the United States, residing in Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Paper-Trimming Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to machines for triinming the edges of bundles of papers-such as books, pamphlets,circulars,and the like-and has special relation to that class of machines in which provision is made for the trimming of two piles or bundles of paper by a pair of cutting-knives acting automatically and simnltaneouslyin planes parallel to each other to trim two edges at a time. The general construction and operation of this class of machines I have fully shown and described in my Letters Patent No. 594,490, of November 30, 1897, for paper-trimming machines; and my present invention relates to certain novel and useful improvements in the clamps for holding the paper under the cutting operation. In the use of my invention, however, I do not wish to limit it to paper-trimming machines of the kind shown in my abovementioned patent, because, as will readily be seen when the invention is described, it can be employed on any paper-trimming machine in which clamps are used to hold down a plurality of bundles of paper. In these papertrimming machines as heretofore constructed it has been customary to provide a fixed and rigid clamp head or nut, to which the clamp-plates have been attached, and to apply the clamping pressure by drawing down or pressing down the rigid clamp-plates upon the bundles of paper. It will be evident, however, that while two bundles of paper may contain the same number of pamphlets or circulars these two bundles will frequently not be of the same height, one pile of paper being more spongy than a similar pile of the same numberof sheets. It also frequently happens that through carelessness or inadvertence of the operator the same number of sheets or pamphlets are not placed in each pile. The

providing clamp-plates which will themselves oscillate in narrow limits, all of which features of novelty will be hereinafter set forth in the specification and pointed out in the claims.

In the drawings, Figure l is a top plan view of my improved clamping devices. Fig. 2 is a side elevation of same.

The details of the construction of the papertrimming machine are not shown in the drawings, as any convenient form of paper-trimming machine may be employed in connection with my invention, and I have applied my construction to the paper-trimming machine which is fully shown and described in my Letters Patent above mentioned, No. 594,490, of November 30, 1897; and as my present invention relates solely to the clamp mechanism I will not here describe the main features of the machine itself, but will merely refer to my aforesaid patent.

A is the clamp-head or clamp-lever, corresponding to the ordinary movable clamp head or plate of paper-trimming machines.

B is the clamp-screw, pivoted by the pivotpin 0 to the middle of the clamp-lever A. This clamp-screw B is screw-threaded at its lower end, where it engages the beveled driving-gear D, so that the rotation of the gear D in either direction by suitable mechanism shall raise or lower the clam p-screw and with it the clamp-lever.

E E are the ordinary upright posts which extend upward from the clamp-table, which serve as a guide for the clamp-head A and also as back-gages for the bundles of paper to be trimmed.

F F are the clamp-plates, pivoted by the links G G to the outer end of the-clamp-lever A, a a being the pivot-pins for these links to l the clamp-plates, and b b the pivot-pins of the links to the clamp-lever.

c c are boxes on the clamp-lever, in which are located the spiral springs d d, the outer ends of which springs bear against the flattened upper ends of the links G G, the purpose of which is to hold the clamp-plates F F in contact with the uprights E E, with the pivotal centers of the clamp-plates inside of the pivotal points of the links with the clamp-lever. Otherwise as the clamp is put in operation there would be a tendency of the clamps oscillating out of position. In order to limit the tipping or oscillatory movement of the clamp-plates, the links G G are formed with feet e e, which serve as stops against the upper surface of the clamp-plates to prevent too much oscillation.

The operation of my improved clamp mechanism will be evident from the foregoing description. When the bundles of paper have been inserted under the clamp, the driving mechanism is operated to draw down the clamp-screw B, and the clamp-plates are brought in contact with the paper bundles. Any difference in height of the paper bundles with reference to each other will at once cause the clamp-head A to oscillate, so that perfectly-even pressure may be applied to both bundles. Any difference in thickness of the bundles individually will cause the particular clamp to oscillate slightly on its pivot to compensate for this unevenness.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

I. In a paper-trimming machine, a clamphead with clamp-screw pivoted to the middle thereof, and clamp plates pivoted to the clamp-head, whereby the same may oscillate to conform to varying heights of paper bundles, substantially as shown and described.

2. In a paper-trimming machine, a clamphead with clamp-screw pivoted to the middle thereof, and clamp-plates with links pivotally connecting said plates with the head, substantially as shown and described.

3. In a paper-trimming machine, a clamp head and clamp-screw pivoted to the middle thereof, and clamp-plates with links pivotally connecting said plates with the head, guide-posts along which said plates are guided, the pivot-pins for the clamp-plates being in side the clamp-head pivotsand means for holding the clamp-plates in said position, substantiall y as shown and described.

CHARLES SEYBOLD.

Witnesses:

FRANK II. HERBsT, EDMUND LIN WEILER. 

